Abstract:
A mechanochemical actuator capable of producing mechanical energy in response to stimuli such as change in pH or salt concentration comprises a polymer composed of hydrophobic polymeric segments and hydrophilic polymeric segments, said hydrophobic polymeric segments being derived from either (1) a copolymer formed from a hydrophobic polymerizable monomer and a polymerizable monomer capable of forming hydrophilic polymeric segments after copolymerization with said hydrophobic polymerizable monomer and, if necessary, polymer modification, or (2) a modified product of said copolymer. Examples include a saponified product of an ethylene-acrylic acid copolymer or butadiene-acrylic acid copolymer, or a maleic acid-modified product of EPDM or polybutadiene, or a sulfone-modified product of EPDM or polybutadiene. The actuator can be used in small machines (eg robots), medical appliances and prosthetic devices.
Abstract:
A rubber composition which contains, in a matrix consisting mainly of rubber, irregularly shaped particles having high hardness, and subjected to surface treatment for improving their affinity for the matrix, or their adhesion to it.
Abstract:
Rubber compsn. contains particles of high hardness dispersed in rubber. The particles have a coating of rubber. Also claimed is the prepn. of the above compsn. involving coating the particles and dispersing in the rubber. The particles are of ceramic, hardened polymer or metal of Vickers hardness (HV) above 20, and are pref. of silica, SiO2 or Al2O3. The size is 20-80 mesh. The coating thickness is smaller than the dia. of the particles and the coating contains an adhesive, polymer for an adhesive or a resin. USE/ADVANTAGE - Used for the mfr. of tyre treads or shoe soles. The compsns. have high friction on ice and high abrasion resistance.
Abstract:
A rubber composition which contains, in a matrix consisting mainly of rubber, irregularly shaped particles having high hardness, and subjected to surface treatment for improving their affinity for the matrix, or their adhesion to it.
Abstract:
A rubber composition in which highly hard particles formed with a rubber-philic coating layer by a fluidized coating treatment are dispersed in a rubber material.